Home / 6,420.38-8,860.10-3,767.76

Finding the Fourth Proportional to 6,420.38, 8,860.10 and 3,767.76

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Solution

The fourth proportional to 6,420.38, 8,860.10 and 3,767.76 is: 5,199.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.38 : 8,860.10 = 3,767.76 : x
  2. Step 2: Convert to fraction form
    6,420.38/8,860.10 = 3,767.76/x
  3. Step 3: Cross multiply
    6,420.38x = 8,860.10 × 3,767.76
  4. Step 4: Simplify right side
    6,420.38x = 33,382,711.54
  5. Step 5: Solve for x
    x = 33,382,711.54/6,420.38
  6. Step 6: Final answer
    x = 5,199.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.